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[Tuning] Linux DR Tuning - Part 1 (#3452)

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* [Tuning] Linux DR Tuning - Part 1

* Update command_and_control_linux_tunneling_and_port_forwarding.toml

* Update command_and_control_cat_network_activity.toml
This commit is contained in:
Ruben Groenewoud
2024-02-20 14:38:19 +01:00
committed by GitHub
parent 0e48747aa6
commit 1dc7fd6a42
5 changed files with 66 additions and 41 deletions
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rules/linux/command_and_control_cat_network_activity.toml
+12 -5
View File
@@ -4,7 +4,7 @@ integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/11/02"
updated_date = "2024/02/19"
[transform]
[[transform.osquery]]
@@ -138,10 +138,17 @@ tags = [
type = "eql"
query = '''
sequence by host.id, process.entity_id with maxspan=1s
[process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and process.name == "cat" and
process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")]
[network where host.os.type == "linux" and event.action in ("connection_attempted", "disconnect_received") and process.name == "cat" and
destination.ip != null and not cidrmatch(destination.ip, "127.0.0.0/8", "169.254.0.0/16", "224.0.0.0/4", "::1")]
[process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and
process.name == "cat" and process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")]
[network where host.os.type == "linux" and event.action in ("connection_attempted", "disconnect_received") and
process.name == "cat" and not (destination.ip == null or destination.ip == "0.0.0.0" or cidrmatch(
destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29",
"192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24",
"192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10",
"192.175.48.0/24","198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10",
"FF00::/8"
)
)]
'''
[[rule.threat]]
rules/linux/command_and_control_linux_suspicious_proxychains_activity.toml
+10 -7
View File
@@ -1,10 +1,10 @@
[metadata]
creation_date = "2023/08/23"
integration = ["endpoint"]
integration = ["endpoint", "auditd_manager"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/11/02"
updated_date = "2024/02/19"
[transform]
[[transform.osquery]]
@@ -40,7 +40,7 @@ restricted resources. Attackers can exploit the ProxyChains utility to hide thei
and perform malicious activities through a chain of proxy servers, potentially masking their identity and intentions.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*"]
language = "eql"
license = "Elastic License v2"
name = "Suspicious Utility Launched via ProxyChains"
@@ -139,16 +139,19 @@ tags = [
"OS: Linux",
"Use Case: Threat Detection",
"Tactic: Command and Control",
"Data Source: Elastic Defend"
"Data Source: Elastic Defend",
"Data Source: Elastic Endgame",
"Data Source: Auditd Manager"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and
process.name == "proxychains" and process.args : (
process where host.os.type == "linux" and event.action in ("exec", "exec_event", "executed") and
event.type == "start" and process.name == "proxychains" and process.args : (
"ssh", "sshd", "sshuttle", "socat", "iodine", "iodined", "dnscat", "hans", "hans-ubuntu", "ptunnel-ng",
"ssf", "3proxy", "ngrok", "gost", "pivotnacci", "chisel*", "nmap", "ping", "python*", "php*", "perl", "ruby",
"lua*", "openssl", "nc", "netcat", "ncat", "telnet", "awk", "java", "telnet", "ftp", "curl", "wget")
"lua*", "openssl", "nc", "netcat", "ncat", "telnet", "awk", "java", "telnet", "ftp", "curl", "wget"
)
'''
[[rule.threat]]
rules/linux/command_and_control_linux_tunneling_and_port_forwarding.toml
+20 -17
View File
@@ -4,7 +4,7 @@ integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/11/02"
updated_date = "2024/02/19"
[transform]
[[transform.osquery]]
@@ -39,7 +39,7 @@ leverage tunneling and port forwarding techniques to bypass network defenses, es
and gain unauthorized access to internal resources, facilitating data exfiltration, lateral movement, and remote control.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
index = ["logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Linux Tunneling and/or Port Forwarding"
@@ -141,25 +141,28 @@ tags = [
"OS: Linux",
"Use Case: Threat Detection",
"Tactic: Command and Control",
"Data Source: Elastic Defend"
"Data Source: Elastic Defend",
"Data Source: Elastic Endgame"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and ((
// gost & pivotnacci - spawned without process.parent.name
(process.name == "gost" and process.args : ("-L*", "-C*", "-R*")) or (process.name == "pivotnacci")) or (
// ssh
(process.name in ("ssh", "sshd") and (process.args in ("-R", "-L", "D", "-w") and process.args_count >= 4 and
not process.args : "chmod")) or
// sshuttle
(process.name == "sshuttle" and process.args in ("-r", "--remote", "-l", "--listen") and process.args_count >= 4) or
// socat
(process.name == "socat" and process.args : ("TCP4-LISTEN:*", "SOCKS*") and process.args_count >= 3) or
// chisel
(process.name : "chisel*" and process.args in ("client", "server")) or
// iodine(d), dnscat, hans, ptunnel-ng, ssf, 3proxy & ngrok
(process.name in ("iodine", "iodined", "dnscat", "hans", "hans-ubuntu", "ptunnel-ng", "ssf", "3proxy", "ngrok"))
process where host.os.type == "linux" and event.action in ("exec", "exec_event") and
event.type == "start" and (
(
// gost & pivotnacci - spawned without process.parent.name
(process.name == "gost" and process.args : ("-L*", "-C*", "-R*")) or (process.name == "pivotnacci")) or (
// ssh
(process.name in ("ssh", "sshd") and (process.args in ("-R", "-L", "D", "-w") and process.args_count >= 4 and
not process.args : "chmod")) or
// sshuttle
(process.name == "sshuttle" and process.args in ("-r", "--remote", "-l", "--listen") and process.args_count >= 4) or
// socat
(process.name == "socat" and process.args : ("TCP4-LISTEN:*", "SOCKS*") and process.args_count >= 3) or
// chisel
(process.name : "chisel*" and process.args in ("client", "server")) or
// iodine(d), dnscat, hans, ptunnel-ng, ssf, 3proxy & ngrok
(process.name in ("iodine", "iodined", "dnscat", "hans", "hans-ubuntu", "ptunnel-ng", "ssf", "3proxy", "ngrok"))
) and process.parent.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")
)
'''
rules/linux/credential_access_credential_dumping.toml
+13 -8
View File
@@ -4,7 +4,7 @@ integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/11/02"
updated_date = "2024/02/19"
[rule]
author = ["Elastic"]
@@ -53,30 +53,35 @@ For more details on Elastic Defend refer to the [helper guide](https://www.elast
"""
severity = "medium"
tags = ["Data Source: Elastic Endgame", "Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Defend"]
tags = [
"Domain: Endpoint",
"OS: Linux",
"Use Case: Threat Detection",
"Tactic: Credential Access",
"Data Source: Elastic Defend",
"Data Source: Elastic Endgame"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
process where host.os.type == "linux" and process.name == "unshadow" and
event.type == "start" and event.action in ("exec", "exec_event") and process.args_count >= 2
process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and
process.name == "unshadow" and process.args_count >= 3
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1003"
name = "OS Credential Dumping"
reference = "https://attack.mitre.org/techniques/T1003/"
[[rule.threat.technique.subtechnique]]
id = "T1003.008"
name = "/etc/passwd and /etc/shadow"
reference = "https://attack.mitre.org/techniques/T1003/008/"
[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"
rules/linux/credential_access_gdb_init_memory_dump.toml
+11 -4
View File
@@ -4,7 +4,7 @@ integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/11/02"
updated_date = "2024/02/19"
[rule]
author = ["Elastic"]
@@ -14,7 +14,7 @@ dumping techniques to attempt secret extraction from privileged processes. Tools
"truffleproc" and "bash-memory-dump". This behavior should not happen by default, and should be investigated thoroughly.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
index = ["logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Linux init (PID 1) Secret Dump via GDB"
@@ -51,11 +51,18 @@ For more details on Elastic Defend refer to the [helper guide](https://www.elast
"""
severity = "medium"
tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Defend"]
tags = [
"Domain: Endpoint",
"OS: Linux",
"Use Case: Threat Detection",
"Tactic: Credential Access",
"Data Source: Elastic Defend",
"Data Source: Elastic Endgame"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and
process where host.os.type == "linux" and event.action in ("exec", "exec_event") and event.type == "start" and
process.name == "gdb" and process.args in ("--pid", "-p") and process.args == "1"
'''